CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2017	Sep. 30, 2016
Cash Flows from Operating Activities:
Net income	$ 170,523	$ 156,017
Adjustments to reconcile net income to net cash provided by operations:
Depreciation	107,017	109,156
Amortization	7,643	6,788
Stock based compensation	15,005	17,823
Provision for doubtful accounts	124	369
Deferred income taxes	(2,265)	(661)
Defined benefit plan expense	12,932	12,632
Equity in results of affiliates	142	187
Changes in balance sheet items, excluding effects from foreign currency adjustments:
Accounts and other receivables	(46,038)	(54,243)
Inventories	(1,392)	(11,284)
Prepaid and other current assets	(10,839)	(14,244)
Accounts payable and accrued liabilities	49,158	3,491
Income taxes payable	2,061	(595)
Retirement and deferred compensation plan liabilities	(20,621)	(14,419)
Other changes, net	(18,288)	(8,597)
Net Cash Provided by Operations	265,162	202,420
Cash Flows from Investing Activities:
Capital expenditures	(120,803)	(92,366)
Proceeds from sale of property and equipment, including insurance proceeds	2,345	2,049
Settlement for derivative	(66,155)
Maturity of short-term investments		29,485
Acquisition of business, net of cash acquired		(202,985)
Acquisition of intangible assets		(2,491)
Investment in unconsolidated affiliate	(5,000)
Notes receivable, net	451	777
Net Cash Used by Investing Activities	(189,162)	(265,531)
Cash Flows from Financing Activities:
Proceeds from (repayments of) notes payable	(63,905)	132,622
Proceeds from long-term obligations	625,525	5,950
Repayments of long-term obligations	(4,836)	(53,512)
Dividends paid	(60,002)	(56,597)
Credit facility costs	(2,937)
Proceeds from stock option exercises	66,686	49,457
Purchase of treasury stock	(72,270)
Common stock repurchased and retired	(40,994)	(84,790)
Excess tax benefit from exercise of stock options		7,960
Net Cash Provided by Financing Activities	447,267	1,090
Effect of Exchange Rate Changes on Cash	29,112	4,857
Net Increase (Decrease) in Cash and Equivalents	552,379	(57,164)
Cash and Equivalents at Beginning of Period	466,287	489,901
Cash and Equivalents at End of Period	$ 1,018,666	$ 432,737

The amount of the payments for the repurchase and retirement of common stock.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of cost (reversal of cost) for employee benefits and share-based payment arrangement. Includes, but is not limited to, pension, other postretirement, postemployment and termination benefits.

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Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets.

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Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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The cash outflow for a financial contract that meets the hedge criteria as either a cash flow hedge, fair value hedge, or hedge of a net investment in a foreign operation.

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The cash outflow to reacquire common stock during the period.

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The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

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Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity.

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The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase.

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The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill.

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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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